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Crystal Quest Water Filters
    • Whole house Filters every tap
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    • Shower & bath For shower and bath
    • Whole house RO RO for every tap
    • Countertop Sits by the faucet
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    Specialty filtration

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    • Shower filter replacement cartridge
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    Type the code printed on your cartridge.

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    • CQE-RC-04047 Pitcher
    • CQE-RC-04002 SMART cartridge
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    Reverse osmosis

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    • Industrial seawater
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    Commercial systems

    • SMART systems
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    • Salt-free anti-scale
    • Demineralizers (DI)
    • Water stores

    Industrial

    • Industrial filtration
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    Commercial/industrial specialty systems
    • Acid neutralizing (commercial)
    • Arsenic removal
    • Fluoride removal
    • Lead removal
    • Nitrate removal
    • Tannin removal
    • Turbidity removal
    • Iron, manganese, sulfide
    • Radium and uranium (commercial)
    • Sulfate removal
    • Silica removal
    • Alkalizer and mineralizer
  • Full water tests

    • City water test
    • Well water test
    • Radiological test
    • Complete RO water test
    • Problem check test
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    Single contaminant tests

    • Lead test
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    Free tools

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    Need help? Get expert support from water filtration specialists (800) 934-0051 help@crystalquest.com

    A water specialist can help you choose and care for your system, Monday to Friday, 9am to 5pm ET.

Search filters, cartridges or a SKU Cart, 0 items 0
  • Whole house
  • Drinking water
  • Shower and bath
  • Softeners
  • Well water
  • Replacements
Crystal Quest Water Filters
Search filters, cartridges or a SKU
Water filters

Menu Water filters

Water filters

Not sure which system you need?

Answer a few questions about your water and home to find the right system.

Take the quiz

Or try a focused quiz

  • Well water filter finder
  • Water softener quiz

Shop by category

  • Whole house Filters every tap
  • Water softeners For hard water
  • Reverse osmosis For drinking water
  • Under sink Fits under the sink
Whole house
  • Whole house Water filters
  • Whole house Reverse osmosis
  • Whole house Salt-based softeners
  • Whole house Salt-free conditioner
  • All salt-free softeners
  • UV sterilization
  • All residential systems
Drinking water
  • Countertop
  • Inline
  • Under sink RO
  • Countertop RO
  • Reverse osmosis guide
  • Faucet mount system
  • Water pitcher
  • All drinking water
Specialty filtration
  • Acid neutralizing
  • Alkaline
  • Arsenic (whole house)
  • Radium and uranium
  • Silica
  • Sulfate
  • Tannins
  • Turbidity (cloudy water)
  • All specialty filters
More ways to filter
  • Shower and bath filters
  • Water coolers
  • Off-grid portable RO
  • Chemical dosing
  • Oxidation disinfection
  • Ozone disinfection
  • UV air sterilizer
  • Bundles
  • Gift card
Water problems

Menu Water problems

Water problems

  • City water Chlorine, chloramine
  • Well water Iron and sulfur
By problem
  • Rotten egg smell
  • Pool smell or chlorine taste
  • Orange or rust stains
  • Black or brown stains
  • Blue-green stains
  • Cloudy water
  • Tea-colored water
By contaminant
  • Arsenic
  • Fluoride
  • Lead
  • Iron, manganese and sulfur
  • Microplastics
  • Nitrate
  • PFAS
  • All contaminants
Where you live
  • Near a military base, airport or fire training site
  • Near a farm
  • Near the coast
  • Granite or mountain areas
  • Older home built before 1986

How hard is your water?

Enter your ZIP code to see the tap water hardness on record for your area.

Replacements

Menu Replacements

Replacements

  • Shower filter replacement cartridge
  • Bath Ball® replacement cartridge
  • Pitcher replacement cartridge
  • Filter cartridges
Cartridges and media
  • Replacement cartridges
  • Filtration media & resins
  • RO filter packs
RO membranes and components
  • Under sink RO membrane
  • Low energy freshwater RO membrane
  • Brackish RO membrane
  • Desalination RO membrane
  • Membrane cleaners
  • RO parts and accessories
  • Water storage tanks
  • All RO membranes
Parts and equipment
  • Shop all parts
  • UV bulbs & parts
  • Valve control heads
  • Pumps and motors
  • Parts directory
Get help
  • Help center
  • Reorder from past orders
  • Find my filter
  • Subscribe and save
  • How often to change filters
  • When to replace a UV lamp
  • About RO membranes
Commercial & industrial

Menu Commercial & industrial

Commercial & industrial

Every system built to order

Quotes on request, from a single inline filter to industrial reverse osmosis.

Request a quote Opens in a new window.
Industries
  • Agriculture and farming
  • Breweries
  • Cannabis cultivation
  • Commercial laundry
  • Food and beverage
  • Government and municipal
  • Medical and lab
  • Mining, oil and gas
  • Multi-residential
  • Plants and manufacturing
  • Schools and campuses
  • Service industries
Reverse osmosis
  • Commercial RO
  • Brackish water RO
  • Seawater desalination
  • Medical-use RO
  • Dosing and pretreatment
  • Industrial RO
  • Industrial fresh water
  • Industrial brackish water
  • Industrial seawater
  • All commercial RO
Commercial systems
  • SMART systems
  • GAC systems
  • Inline systems
  • Ultrafiltration
  • Commercial softeners
  • Traditional softeners
  • Salt-free anti-scale
  • Demineralizers (DI)
  • Water stores
Commercial/industrial specialty systems
  • All specialty systems
  • Acid neutralizing (commercial)
  • Arsenic removal
  • Fluoride removal
  • Lead removal
  • Nitrate removal
  • Tannin removal
  • Turbidity removal
  • Iron, manganese, sulfide
  • Radium and uranium (commercial)
  • Sulfate removal
  • Silica removal
  • Alkalizer and mineralizer
Industrial
  • Industrial filtration
  • Nanofiltration
  • Industrial desalination
  • Ozone systems
  • Industrial UV
  • Chlorination
  • Industrial softeners
  • Industrial salt-free
  • Deionization
  • Wastewater reclamation
  • Containerized systems
  • Cartridge housings
  • Disaster relief
Water testing

Menu Water testing

Water testing

Have a lab report?

Compare your lab results with EPA limits.

Analyze my report
Full water tests
  • City water test
  • Well water test
  • Radiological test
  • Complete RO water test
  • Problem check test
  • Waterborne pathogen panel
  • FHA and VA loan test
  • All water tests
Test collections
  • Specialty tests
  • Quick series tests
  • BART bacteria tests
  • Contaminant-specific tests
Single contaminant tests
  • Lead test
  • Arsenic test
  • Fluoride test
  • Quick bacteria test
  • Nitrate and nitrite test
  • Radon test
  • Uranium test
Free tools
  • Water hardness by ZIP
  • PFAS map
  • Lead in water lookup
  • Hardness converter
  • Softener size calculator
  • All water tools
Resources and help

Menu Resources and help

Resources and help

  • Knowledge base
  • Educational articles
  • Video resources
  • Document Center
  • YouTube channel
Help and support
  • Help center
  • Order status
  • Manage subscription
  • Returns
  • Warranty
  • Installation guides
  • Submit a ticket Opens in a new window.
  • Contact us
Articles by topic
  • All articles
  • Filtration systems
  • Contaminants
  • Filtration technology
  • Filter types
  • Applications
Company
  • About us
  • Reviews
  • Trustpilot reviews Opens in a new window.
  • Custom manufacturing
  • All business opportunities
Need help? Get expert support from water filtration specialists
  • Talk to a specialist(800) 934-0051, Mon to Fri, 9am to 5pm ET
  • Email ushelp@crystalquest.com

Made in USA. Free shipping on residential orders over $150 within the lower 48 US states

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Try the code printed on your cartridge, a product name, or a problem like hard water. Or let us find it for you. Talk to a specialist

Popular searches

  • Shower filter
  • Whole house filter
  • High flow
  • Reverse osmosis
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  • Water softener

Popular replacements

See all replacements
  • Coconut Based 5-Micron Carbon Block cartridge From $22.95
  • SMART cartridge From $59.00
  • Shower Filter cartridge From $29.50
  • Bath Ball® cartridge From $39.50

Common part numbers

  • CQE-RC-04000Coconut Based 5-Micron Carbon Block cartridge
  • CQE-RC-04002SMART cartridge
  • CQE-RC-04045Shower Filter cartridge
  • CQE-RC-04052Bath Ball® cartridge

Popular guides

  • How Often to Change Your Water Filter 14 min read
  • Whole House Water Filter Maintenance 11 min read
  • Hard Water 101 19 min read
  • How to Test Water Hardness at Home 6 min read

Quick links

  • Check your water Hardness by ZIP code
  • Well water filter finder A short quiz that matches a system
  • Water test kits Lab tests for city and well water

  1. Home
  2. Search

Results for “Reverse osmosis”

50 results

All Products Guides Pages

Pages

  • Page

    Reverse Osmosis

    The Crystal Quest© Difference Reverse osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove larger particles from drinking water. In reverse osmosis, an applied pressure is used...
  • Page

    Commercial Reverse Osmosis

    Crystal Quest® Reverse Osmosis Browse Our Commercial Systems We offer high-performance water filtration, conditioning, and reverse osmosis systems for a wide range of applications—including hospitality, healthcare, manufacturing, food service, agriculture, education, government,...
  • Page

    Reverse Osmosis Membrane

      TFC Membrane *Nominal Rejection Characteristics of Reverse Osmosis Membranes ION % Rejection ION % Rejection Calcium 95 - 98 Bromide 93 - 96 Sodium 94 - 98 Phosphate 97 - 98...
  • Page

    Whole House Reverse Osmosis

    Whole House Reverse Osmosis Water Systems Enjoy purified water from every faucet of your home. A Whole House Reverse Osmosis (RO) system is a great solution if you are faced with multiple...
  • Page

    Commercial Reverse Osmosis Systems

    Commercial Reverse Osmosis Systems Customizable to Meet your Business Needs. All systems are shipped out fully assembled providing for easy installation. All membrane systems are factory tested to ensure quality, performance, and...
  • Page

    Industrial Reverse Osmosis Systems

    Industrial Reverse Osmosis Systems Customizable to Meet Your Business Needs Crystal Quest provides a comprehensive range of industrial reverse osmosis systems, including freshwater, brackish water, desalination solutions, and fully customizable options to...
  • Page

    Reverse Osmosis Desalination Systems

    Shark® Salt Water Filtration (Desalination) A Crystal Quest® SHARK® Reverse Osmosis (RO) system is a great solution if you are faced with multiple water issues or if you are trying to achieve...
  • Page

    Reverse Osmosis Parts & Accessories

    Reverse Osmosis Parts & Accessories RO Check Valves RO Faucets RO Tanks RO Pressure Guages RO Brackets & Clips Membrane Housings & Parts RO Membranes Replacement RO Filter Packs
  • Page

    About Reverse Osmosis Membranes

    TFC Membrane *Nominal Rejection Characteristics of Reverse Osmosis Membranes ION  % Rejection  ION  % Rejection  Calcium  95 - 98  Bromide  93 - 96  Sodium  94 - 98  Phosphate  97 - 98  Magnesium ...
  • Page

    Reverse Osmosis for Brackish Water

    Brackish Reverse Osmosis Systems Brackish Water Brackish water or briny water is water that has more salinity than fresh water, but not as much as seawater. It may result from mixing of...
  • Page

    Off-Grid Reverse Osmosis Water System

    Off-Grid, Portable Reverse Osmosis Water System - 200 Gallons Per Day Explore the world with clean, safe drinking-water. The Crystal Quest Off-Grid Reverse Osmosis Water System is a portable, compact, mobile, and...
  • Page

    Commercial Reverse Osmosis Water Filters for Medical-Use

    Lab & Medical Water Purification MEMBRANE TECHNOLOGY + MEDIA FILTRATION + ULTRAVIOLET ADD-ON AND MORE OPTIONAL UPGRADES Transforming Healthcare with Advanced Medical Water Filtration Solutions Step into the realm of advanced medical...
  • Page

    Medical & Laboratory Water Filtration

    Laboratory & Medical Water Filtration Laboratory & Medical Water Filtration Superior Medical Water Filtration Systems: Ensuring Uncompromising Purity for Essential Lab & Healthcare Applications Transforming Healthcare with Advanced Medical Water Filtration Solutions...
  • Page

    Coffee Water Filtration

    Coffee Water Filtration Elevate Your Coffee Experience with Crystal Quest Water Filters Smart GAC Filtration System SMART GAC Water Filtration System reduces & removes harmful contaminants using our special house blend known...
  • Page

    Comparison Chart

     Comparison Chart for Under Sink Reverse Osmosis THUNDER® Series C, M & P Models  *Faucet and hardware are included.  - 1,000C 1,000M  2,000C 2,000M 3,000C 3,000M 4,000C 4,000M Stages of Filtration 12 15...
  • Page

    Chlorine In Your Home

    Water contains chlorine. Millions of people consume chlorinated tap water every day. What chlorine is Carl Wilhelm Scheele, a Swedish pharmacist, dropped a few drops of hydrochloric acid upon a bit of...
  • Page

    Pump Quick Guides

    Pump Product Quick Guides Your source for detailed information on America's best pumps. Pumps G20B7-3M Pump Key Features: Materials: Stainless steel and cast iron for durability. Impellers: Made from high-strength materials for...
  • Page

    What Is Ultrafiltration?

    NEW ARRIVALS Ultrafiltration Systems & Membranes Ultrafiltration (UF) is a membrane filtration process similar to Reverse Osmosis, using hydrostatic pressure to force water through a semi-permeable membrane. Call To Order What is...
  • Page

    Custom Manufacturing.

    Custom Manufacturing High Quality Components To guarantee a reliable and durable product, Crystal Quest® custom water and air treatment systems are manufactured with the highest quality components by Scientific World Products.  ...
  • Page

    Cannabis Water Filtration

    Cannabis Water Filtration Cannabis Water Filtration Optimize Your Commercial Cannabis Cultivation with Crystal Quest's Commercial RO Systems Unlock the full potential of your commercial cannabis operation with Crystal Quest's cutting-edge water filtration...
  • Page

    Premium Water Filtration Systems for Breweries

    Brewery Water Filtration Brewery Water Filtration Experience Unparalleled Taste Consistency and Quality with Crystal Quest's Advanced Filtration Solutions Elevate your brewery's craft and taste with Crystal Quest's industry-leading water filtration solutions designed...
  • Page

    Disinfect Personal Protection Equipment and Gear

    NEW ARRIVALS Disinfect Personal Protection Gear and Equipment Ultrafiltration (UF) is a membrane filtration process similar to Reverse Osmosis, using hydrostatic pressure to force water through a semi-permeable membrane. Speak With A...
  • Page

    Drinking Water Filters

    Countertop Water Filters Filtered Water at an Affordable Price Explore ❯ Our Countertop Water Filters are available in a variety of sizes, colors, and configurations. These filters conveniently provide purified water near...
  • Page

    featured-pumps

    Discover Crystal Quest's High Quality Water Pumps Explore the versatile range of Crystal Quest water pumps tailored for residential, commercial, and industrial applications. Featured Pumps G20B7-3M Pump The G20B7-3M is a horizontal...
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  • Lead
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